HAWTHORNE, Calif. -- NASA astronaut Rex Walheim checks out the Dragon spacecraft under development by Space Exploration Technologies SpaceX of Hawthorne, Calif., for the agency's Commercial Crew Program. In 2011, NASA selected SpaceX during Commercial Crew Development Round 2 CCDev2) activities to mature the design and development of a crew transportation system with the overall goal of accelerating a United States-led capability to the International Space Station. The goal of CCP is to drive down the cost of space travel as well as open up space to more people than ever before by balancing industry’s own innovative capabilities with NASA's 50 years of human spaceflight experience. Six other aerospace companies also are maturing launch vehicle and spacecraft designs under CCDev2, including Alliant Techsystems Inc. ATK, The Boeing Co., Excalibur Almaz Inc., Blue Origin, Sierra Nevada, and United Launch Alliance ULA. For more information, visit www.nasa.gov/commercialcrew. Image credit: Space Exploration Technologies
NASA astronaut Rex Walheim checks out the Dragon spacecraft und
JSC2003-E-47248 (13 June 2003) --- Astronaut Rex J. Walheim, mission specialist.
Official Portrait of Astronaut Rex J. Walheim.
Astronaut Rex Walheim spoke at the USA Science and Engineering Festival on April 25, 2014. The festival was open to the public on April 26 and 27, 2014 and was held at the Washington Convention Center in Washington, DC. Photo Credit: (NASA/Aubrey Gemignani)
USA Science and Engineering Festival 2014
Astronaut Rex Walheim spoke at the USA Science and Engineering Festival on April 25, 2014 at the NASA Stage. The festival was open to the public on April 26 and 27, 2014 and was held at the Washington Convention Center in Washington, DC. Photo Credit: (NASA/Aubrey Gemignani)
USA Science and Engineering Festival 2014
Astronaut Rex Walheim spoke at the USA Science and Engineering Festival on April 25, 2014 at the NASA Stage. The festival was open to the public on April 26 and 27, 2014 and was held at the Washington Convention Center in Washington, DC. Photo Credit: (NASA/Aubrey Gemignani)
USA Science and Engineering Festival 2014
JSC2011-E-026902 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026867 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026879 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026887 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026864 (11 March 2011) --- NASA astronaut Rex Walheim (right), STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026872 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026885 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026869 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026878 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026863 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026868 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026871 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026880 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026862 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026896 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-026866 (11 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim
JSC2011-E-036274 (11 Feb. 2011) --- NASA astronaut Rex Walheim, mission specialist. Photo credit: NASA
Walheim Official Individual ACES suit photo
JOHNSON SPACE CENTER, Houston --  JSC2003-E-47248 -- Astronaut Rex J. Walheim, mission specialist
KSC-07pd3284
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014.  Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014.  Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
Astronaut Rex Walheim meets students at the USA Science and Engineering Festival in Washington on April 25, 2014. Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
S122-E-008796 (15 Feb. 2008)  --- Astronaut Rex Walheim, mission specialist, uses a power tool while installing a handrail on the Columbus laboratory, the newest piece of hardware on the International Space Station.  Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
Walheim during EVA 3
S122-E-008954 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, works on the new Columbus laboratory's exterior during  the  STS-122 Atlantis crew's final scheduled spacewalk. Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
Walheim during EVA 3
S122-E-008923 (15 Feb. 2008)  --- Astronaut Rex Walheim, mission specialist, performs work on the outside of the Columbus laboratory, the newest piece of hardware on the International Space Station.  Astronaut Stanley Love (out of frame), mission specialist, shared this final period of STS-122 extravehicular activity with Walheim.
Walheim during EVA 3
ISS016-E-029500 (15 Feb. 2008) ---  Astronaut Rex Walheim, mission specialist, holds onto a handrail on the Columbus laboratory, the newest piece of hardware on the International Space Station.  Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
Walheim during EVA 3
S122-E-008950 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, works on the new Columbus laboratory's exterior during  the  STS-122 Atlantis crew's final scheduled spacewalk. Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
Walheim during EVA 3
S122-E-008781 (15 Feb. 2008)  --- Astronaut Rex Walheim, mission specialist, holds onto a handrail on the Columbus laboratory, the newest piece of hardware on the International Space Station.  Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
Walheim during EVA 3
S122-E-008922 (15 Feb. 2008)  --- Astronaut Rex Walheim, mission specialist, performs work on the outside of the Columbus laboratory, the newest piece of hardware on the International Space Station.  Astronaut Stanley Love (out of frame), mission specialist, shared this final period of STS-122 extravehicular activity with Walheim.
Walheim during EVA 3
S122-E-008727 (15 Feb. 2008)  --- Astronaut Rex Walheim, mission specialist, closes one eye while focusing on an extravehicular activity task with the other.  Astronaut Stanley Love (out of frame), mission specialist, shared this final spacewalk for the STS-122 Atlantis crew with Walheim.
Walheim during EVA 3
S122-E-008916 (15 Feb. 2008)  --- Astronaut Rex Walheim, mission specialist, performs work on the outside of the Columbus laboratory, the newest piece of hardware on the International Space Station.  Astronaut Stanley Love (out of frame), mission specialist, shared this final period of STS-122 extravehicular activity with Walheim.
Walheim during EVA 3
S122-E-008764 (15 Feb. 2008)  --- Astronaut Rex Walheim, mission specialist, holds onto a handrail on the Columbus laboratory, the newest piece of hardware on the International Space Station.  Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
Walheim during EVA 3
NASA’s Administrator, Charles Bolden (left), President/CEO of Lockheed Martin, Marillyn Hewson (right), and astronaut Rex Walheim (back row) pose for a group photo with the winning high school team in the Exploration Design Challenge. Team ARES from the Governors School for Science and Technology in Hampton, Va. won the challenge with their radiation shield design, which will be built and flown aboard the Orion/EFT-1. The award was announced at the USA Science and Engineering Festival on April 25, 2014 at the Washington Convention Center. Photo Credit: (NASA/Aubrey Gemignani)
Exploration Design Challenge 2014
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim speaks from podium. Part of Batch image transfer from Flickr.
Exploration Design Challenge
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim poses for photo with students. Part of Batch image transfer from Flickr.
Exploration Design Challenge
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim talks with students. Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
STS110-E-5006 (8 April 2002) --- Astronaut Rex J. Walheim, STS-110 mission specialist, works on the mid deck of the Space Shuttle Atlantis. The image was taken with at digital still camera.
MS Walheim poses with an WVS equipment on the middeck of Atlantis during STS-110
At NASA's Kennedy Space Center in Florida, NASA leaders spoke to social media participants as the Orion spacecraft and its Delta IV Heavy rocket were being prepared for launch. Speakers included NASA astronaut Rex Walheim.
NASA Social for the Launch of Orion
NASA astronaut Rex Walheim is lowered into the water to train for spacewalk  in the Neutral Buoyancy Laboratory (NBL) on Tuesday, March 22, 2011, in Houston.  ( NASA Photo / Houston Chronicle, Smiley N. Pool )
STS_135_NLB
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim signs autographs for students. Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim is photographed with students. Part of Batch image transfer from Flickr.
Exploration Design Challenge
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim speaks to students. Part of Batch image transfer from Flickr.
Exploration Design Challenge
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim is photographed with event participant. Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim is photographed with students. Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim speaks to students. Part of Batch image transfer from Flickr.
Exploration Design Challenge
JOHNSON SPACE CENTER, Houston, Texas --- JSC2011-E-036274 --- NASA astronaut Rex Walheim, mission specialist. Photo credit: NASA or National Aeronautics and Space Administration
KSC-2011-4291
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim poses for photo with students. Part of Batch image transfer from Flickr.
Exploration Design Challenge
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim talks with students. Part of Batch image transfer from Flickr.
Exploration Design Challenge
JSC2002-E-14073 (20 April 2002) --- Astronaut Rex J. Walheim, STS-110 mission specialist, speaks from the lectern in Hangar 990 at Ellington Field during the crew return ceremonies.
STS-110 Crew Return at Ellington Field, Hangar 990
ISS004-E-10100 (16 April 2002) --- Astronaut Rex J. Walheim, STS-110 mission specialist, looks out a window in the Zvezda Service Module on the International Space Station (ISS).
STS-110 MS Walheim looks through a window in the Zvezda SM during Expedition Four
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim talks with students. Part of Batch image transfer from Flickr.
Exploration Design Challenge
S122-E-009541 (16 Feb. 2008) --- Astronaut Rex Walheim, STS-122 mission specialist, is pictured on the middeck of Space Shuttle Atlantis while docked with the International Space Station.
Walheim on Atlantis MDDK
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim speaks from podium. Part of Batch image transfer from Flickr.
Exploration Design Challenge
S122-E-009101 (15 Feb. 2008) --- Astronaut Alan Poindexter, STS-122 pilot, inspects the gloves of astronaut Rex Walheim, mission specialist, following the ingress of astronauts Walheim and Stanley Love (partially out of frame at left) following the final space walk of a busy week.  Astronaut Peggy Whitson, the International Space Station's Expedition 16 commander, checks Love's gloves.
Whitson, Poindexter and Walheim in the A/L
ISS016-E-029502 (15 Feb. 2008) --- Astronaut Rex Walheim, mission specialist, holds onto a handrail and spreads his arms at the Columbus laboratory, the newest piece of hardware on the International Space Station.  On this the final spacewalk for the STS-122 Atlantis crew, Walheim's pose is reminiscent of that of a musical conductor who has just completed leading a successful concert.  Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
Walheim during EVA 3
Astronaut Rex Walheim (center) speaks to members of the Mississippi House of Representatives in chambers during NASA Day at the Capitol in Jackson on Feb. 19. Walheim was joined at the podium by members of the Mississippi House of Representatives Gulf Coast delegation, as well as Stennis Space Center Director Gene Goldman (astronaut's immediate right) and NASA's Shared Services Center Director Rick Arbuthnot and Partners for Stennis Executive Director Tish Williams (astronaut's immediate left).
NASA Day at the Capitol
S122-E-008118 (13 Feb. 2008) --- Attired in their Extravehicular Mobility Unit (EMU) spacesuits, European Space Agency (ESA) astronaut Hans Schlegel (left) and NASA astronaut Rex Walheim, both STS-122 mission specialists, prepare for the mission's second session of extravehicular activity (EVA) in the Quest Airlock of the International Space Station while Space Shuttle Atlantis is docked with the station. NASA astronaut Steve Frick, commander, assisted Schlegel and Walheim.
Schlegel, Frick and Walheim in the A/L prior to EVA 2
S122-E-009094 (15 Feb. 2008) --- Commanders of the STS-122 Atlantis crew and the International Space Station's expedition, respectively, astronauts Steve Frick and Peggy Whitson, assist astronaut Rex Walheim as he ingresses the station following the third and final extravehicular activity during a week in which the Atlantis was docked to the orbital outpost. Astronaut Stanley Love (out of frame), mission specialist, shared this extravehicular activity with Walheim.
Walheim, Frick and Whitson in the A/L
S122-E-008288 (13 Feb. 2008) --- Attired in their Extravehicular Mobility Unit (EMU) spacesuits, European Space Agency (ESA) astronaut Hans Schlegel (left) and NASA astronaut Rex Walheim, both STS-122 mission specialists, are pictured in the Quest Airlock of the International Space Station as the mission's second spacewalk draws to a close. NASA astronaut Steve Frick, commander, assisted Schlegel and Walheim.
Schlegel, Frick and Walheim in the A/L
S122-E-008297 (13 Feb. 2008) --- Attired in their Extravehicular Mobility Unit (EMU) spacesuits, European Space Agency (ESA) astronaut Hans Schlegel (left) and NASA astronaut Rex Walheim, both STS-122 mission specialists, are pictured in the Quest Airlock of the International Space Station as the mission's second spacewalk draws to a close. NASA astronaut Peggy Whitson, Expedition 16 commander, assisted Schlegel and Walheim.
Schlegel, Whitson and Walheim in the A/L
ISS004-E-9986 (10 April 2002) --- Astronaut Rex J. Walheim, STS-110 mission specialist, stands near an Extravehicular Mobility Unit (EMU) space suit in the Quest Airlock on the International Space Station (ISS). Astronaut Carl E. Walz, Expedition Four flight engineer, is visible in the background.
STS-110 MS Walheim poses with an EMU in the Quest A/L during Expedition Four
ISS016-E-028885 (9 Feb. 2008) --- NASA astronaut Rex Walheim (left) and European Space Agency (ESA) astronaut Hans Schlegel, both STS-122 mission specialists, work with Extravehicular Mobility Unit (EMU) spacesuits in the Quest Airlock of the International Space Station while Space Shuttle Atlantis is docked with the station.
Walheim and Schlegel in A/L
S135-E-007118 (10 July 2011) ? NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured at controls on the flight deck of the space shuttle Atlantis during rendezvous and docking operations with the International  Space Station. NASA astronaut Rex Walheim, mission specialist, is at right.  Photo credit: NASA
Magnus and Walheim on Atlantis Aft Flight Deck during Rendezvous OPS
S122-E-009076 (15 Feb. 2008) --- Astronaut Stanley Love, mission specialist, works on the new Columbus laboratory's exterior during  the  STS-122 Atlantis crew's final scheduled spacewalk. Astronaut Rex Walheim (out of frame), mission specialist, shared this extravehicular activity with Love.
Love during EVA 3
S122-E-008187 (13 Feb. 2008) --- European Space Agency (ESA) astronaut Hans Schlegel (left) and NASA astronaut Rex Walheim, both STS-122 mission specialists, participate in the mission's second scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 45-minute spacewalk, among other tasks, Walheim and Schlegel worked to replace a nitrogen tank used to pressurize the station's ammonia cooling system.
Schlegel and Walheim during EVA 2
S122-E-008323 (13 Feb. 2008) --- Astronaut Rex Walheim, STS-122 mission specialist, participates in the mission's second scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 45-minute spacewalk, among other tasks, Walheim and European Space Agency (ESA) astronaut Hans Schlegel (out of frame), mission specialist, worked to replace a nitrogen tank used to pressurize the station's ammonia cooling system.
Walheim during EVA 2
S122-E-008199 (13 Feb. 2008) --- European Space Agency (ESA) astronaut Hans Schlegel (right) and NASA astronaut Rex Walheim, both STS-122 mission specialists, participate in the mission's second scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 45-minute spacewalk, among other tasks, Walheim and Schlegel worked to replace a nitrogen tank used to pressurize the station's ammonia cooling system.
Walheim and Schlegel during EVA 2
JSC2007-E-21201 (1 May 2007) --- Astronaut Rex J. Walheim (left) and European Space Agency (ESA) astronaut Hans Schlegel, STS-122 mission specialists, enjoy a light moment as they await the start of an emergency egress training session in the Space Vehicle Mockup Facility at Johnson Space Center. Walheim and Schlegel are wearing training versions of their shuttle launch and entry suits.
STS-122 Preflight Egress Training
S122-E-008913 (15 Feb. 2008) --- Astronaut Rex Walheim, STS-122 mission specialist, holds onto a handrail on the Columbus laboratory, the newest piece of hardware on the International Space Station. In his helmet visor is mirrored the forward section of the Space Shuttle Atlantis, to which the station is docked. Astronaut Stanley Love (out of frame), mission specialist, shared this final period of STS-122 extravehicular activity (EVA) with Walheim.
Walheim during EVA 3
S122-E-008200 (13 Feb. 2008) --- European Space Agency (ESA) astronaut Hans Schlegel (top) and NASA astronaut Rex Walheim, both STS-122 mission specialists, participate in the mission's second scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 45-minute spacewalk, among other tasks, Walheim and Schlegel worked to replace a nitrogen tank used to pressurize the station's ammonia cooling system.
Walheim and Schlegel during EVA 2
S122-E-008395 (13 Feb. 2008) --- Astronaut Rex Walheim, STS-122 mission specialist, participates in the mission's second scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 45-minute spacewalk, among other tasks, Walheim and European Space Agency (ESA) astronaut Hans Schlegel (out of frame), mission specialist, worked to replace a nitrogen tank used to pressurize the station's ammonia cooling system.
Walheim during EVA 2
JSC2010-E-084214 (17 May 2010) --- NASA astronauts Rex Walheim (left) and Steve Swanson, spacecraft communicators (CAPCOM) for the STS-132 mission, are pictured in the space station flight control room in the Mission Control Center at NASA's Johnson Space Center during flight day four activities.
STS-132/ULF4 Flight Controllers on Console - Orbit 2
S122-E-008521 (14 Feb. 2008) --- Astronauts Stanley Love (left) and Rex Walheim, both STS-122 mission specialists, look over checklists on the middeck of Space Shuttle Atlantis while docked with the International Space Station.
Love and Walheim on MDDK
S135-E-010692 (19 July 2011) --- NASA astronauts Doug Hurley (left), pilot for the STS-135 mission and Rex Walheim, mission specialist, are pictured on the flight deck of the space shuttle Atlantis prior to undocking/separation from the International Space Station. Photo credit: NASA
Hurley and Walheim on Aft Flight Deck
JSC2007-E-21172 (1 May 2007) --- Astronaut Rex J. Walheim, STS-122 mission specialist, attired in a training version of his shuttle launch and entry suit, awaits the start of an emergency egress training session in the Space Vehicle Mockup Facility at Johnson Space Center.
STS-122 Preflight Egress Training
S135-E-007696 (13 July 2011) --- On Atlantis' middeck, NASA astronauts Rex Walheim and Sandy Magnus, STS-135 mission specialists, discuss the large tasks of moving supplies on the joint shuttle/International Space Station complex during the sixth day in space for the four shuttle crewmembers.  Photo credit:  NASA
Walheim and Magnus on Atlantis Middeck
S122-E-009911 (18 Feb. 2008) --- Astronaut Rex Walheim, STS-122 mission specialist, poses for a photo near a window on the aft flight deck of Space Shuttle Atlantis shortly after undocking from the International Space Station, which is visible through the window.
Walheim on FD
S122-E-007664 (10 Feb. 2008) --- Astronauts Peggy Whitson, Expedition 16 commander; Stanley Love and Rex Walheim (bottom), both STS-122 mission specialists, work in the Quest Airlock of the International Space Station while Space Shuttle Atlantis is docked with the station.
Whitson,Walheim and Love in A/L
JSC2011-E-060424 (30 June 2011) --- NASA astronauts Sandy Magnus and Rex Walheim, both STS-135 mission specialists, are pictured during a preflight press conference at NASA's Johnson Space Center. Photo credit: NASA
STS-135 Press Conference
S122-E-007162 (9 Feb. 2008) --- Astronauts Steve Frick (left) and Rex Walheim, STS-122 commander and mission specialist, respectively, take a moment for a photo on the aft flight deck of Space Shuttle Atlantis during flight day three activities.
Frick and Walheim on FD during STS-122
The Orion crew module pressure vessel for Exploration Flight Test-1 (EFT-1) is unveiled at a ceremony at the Operations and Checkout (O&C) Building at NASA’s Kennedy Space Center in Florida on July 2, 2012. Astronaut Rex Walheim poses for photo. Part of Batch image transfer from Flickr.
DSC_5890
ISS004-E-9962 (10 April 2002) --- Astronauts Rex J. Walheim (left), Ellen Ochoa, and Lee M. E. Morin, all STS-110 mission specialists, are photographed in the Destiny laboratory on the International Space Station (ISS).
STS-110 MS Walheim, Ochoa, and Morin in U.S. Destiny Lab during Expedition Four
JSC2011-E-024222 (1 March 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, is pictured in the rear station of a NASA T-38 trainer jet prior to a flight at Ellington Field near NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
STS-135 crewmembers Chris Ferguson, Doug Hurley and Rex Walheim
The winner of the high school portion of the Exploration Design Challenge is announced at the USA Science and Engineering Festival in Washington on April 25, 2014. Astronaut Rex Walheim speaks to students from podium. Part of Batch image transfer from Flickr.
USA Science and Engineering Fest
S135-E-010689 (19 July 2011) --- NASA astronauts Doug Hurley (left), pilot for the STS-135 mission and Rex Walheim, mission specialist, are pictured on the flight deck of the space shuttle Atlantis prior to undocking/ separation from the International Space Station. Photo credit: NASA
Hurley and Walheim on Aft Flight Deck
JSC2011-E-060746 (29 June 2011) --- NASA astronauts Doug Hurley (left), STS-135 pilot; Rex Walheim and Sandy Magnus, both mission specialists, are pictured during a training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Photo credit: NASA
STS-135 Escape System Refresher training and Stowage Review Training
S122-E-007945 (12 Feb.2008) --- Astronaut Rex Walheim, STS-122 mission specialist, is pictured on the aft flight deck of Space Shuttle Atlantis during flight day six activities while docked with the International Space Station.
Walheim on FD during Expedition 16/STS-122 Joint Operations
S122-E-007099 (9 Feb. 2008) --- Astronauts Steve Frick (left), STS-122 commander; Rex Walheim, mission specialist; and Alan Poindexter, pilot, take a moment for a photo on the flight deck of Space Shuttle Atlantis during flight day three activities.
Frick, Walheim and Poindexter on FD during STS-122
JSC2011-E-021727 (25 Feb. 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, participates in a training session in a space station mock-up in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
STS-135 crew during Space Station Mockup Training
JSC2011-E-059397 (13 May 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, simulates a spacewalk in the Virtual Reality Laboratory at NASA?s Johnson Space Center May 13, 2011. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool
STS_135_VR
S135-E-006320 (9 July 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, looks through an overhead window on the aft flight deck of the space shuttle Atlantis during the mission's second day of activities in Earth orbit.  Photo credit: NASA
Walheim on Aft Flight Deck
JSC2011-E-060422 (30 June 2011) --- NASA astronauts Sandy Magnus and Rex Walheim, both STS-135 mission specialists, are pictured during a preflight press conference at NASA's Johnson Space Center. Photo credit: NASA
STS-135 Press Conference